Statistiques texte

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#----------------------------------------------------------------------------
# Created by  : Alain Van Kerckhoven
# Created Date: 13 juillet 2016
# Licence     : GPL
# Version     : 1.0
# ---------------------------------------------------------------------------
"""
Compte les lettres, les voyelles et les mots d'une phrase.
"""
# ---------------------------------------------------------------------------


def vowel_count(str):
    count = 0
    vowel = set("aàâäeéèêëioöuüùAEIOU")

    for alphabet in str:
        if alphabet in vowel:
            count = count + 1
    return (count)


def words_count(str):
    prec = " "
    nb_mots = 0
    for char in str:
        nb_mots = nb_mots + int(prec == " " and char != " ")
        prec = char
    return (nb_mots)


phrase = input("Entrez un texte à analyser : ")

nbcar = len(phrase)
nbvowel = vowel_count(phrase)
nbwords = words_count(phrase)

print("Nb de caractères :", nbcar)
print("Nb de voyelles :", nbvowel)
print("Nb de mots :", nbwords)